Answer:
The excerpt from Marian Anderson's "Gifts of Speech" that is factual evidence in her argument is "We have, in this country, about four million women in war jobs, less than a fourth of all our women workers."
Step-by-step explanation:
The argument of Marian Anderson in "Gifts of Speech" was that American women are good soldiers in the labor front and are winning real victories. which meant that American women were a key element for the country to win the war they were facing they were covering jobs that helped both citizens and soldiers in this process.